Which is true regarding translation in bacteria?
A. Translation ends when the Shine-Dalgarno sequence is reached.
B. The 70S ribosome is composed of a 20S and 50S subunit.
C. Translation begins with formation of the 30S initiation complex.
D. All of the choices are correct.
Answer: C
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T-cell receptors can only recognize antigens on the surfaces of antigen-presenting cells; they cannot bind free antigen.
Answer the following statement true (T) or false (F)
The most likely identification of an anaerobic gram-positive coccus that is resistant to metronidazole is:
a. Streptococcus. b. Peptostreptococcus. c. Leptotrichia. d. Peptococcus.
Stephen is studying the regulation of heart rate during exercise in rats. What portion of the
brain is he studying?
a. brain stem b. cerebellum c. cerebrum d. sensory cortex
How does the fact that the mosquito is often a vector of disease relate directly to its method of
obtaining food?
What will be an ideal response?